431328213 has 8 divisors (see below), whose sum is σ = 639004800. Its totient is φ = 287552124.

The previous prime is 431328137. The next prime is 431328217. The reversal of 431328213 is 312823134.

It is not a de Polignac number, because 431328213 - 2¹⁶ = 431262677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 15975119 = 431328213 / (4 + 3 + 1 + 3 + 2 + 8 + 2 + 1 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431328217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7987533 + ... + 7987586.

It is an arithmetic number, because the mean of its divisors is an integer number (79875600).

Almost surely, 2^431328213 is an apocalyptic number.

It is an amenable number.

431328213 is a deficient number, since it is larger than the sum of its proper divisors (207676587).

431328213 is a wasteful number, since it uses less digits than its factorization.

431328213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15975128 (or 15975122 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 431328213 is about 20768.4427196649. The cubic root of 431328213 is about 755.5605754480.

The spelling of 431328213 in words is "four hundred thirty-one million, three hundred twenty-eight thousand, two hundred thirteen".